Date: 28 Apr 1995 23:37:43 -0400 From: G.M. Laurence Subject: Dr. Math Dr. Math, Is there a bigger number than infinity? What is infinity times infinity? Lee Lanteigne, 10, in Mr. Laurence's Grade 4 class at Simcoe St. School Niagara Falls, Ontario
Date: 29 Apr 1995 11:13:43 -0400 From: Dr. Ken Subject: Re: Dr. Math Hello there! One important thing to keep in mind about infinity is that it's not really a number, it's something else. It's a concept that means "something bigger than all numbers." So there are no numbers bigger than infinity, but that DOESN'T mean that infinity is the biggest number, because it's not a number at all. In fact, there is no biggest number, because if you think you've got it, you can always add one, and you've got something bigger. Since infinity isn't really a number, it doesn't always make much sense to multiply it by things, but we can think about doing it anyway. We can say that infinity x infinity = infinity, and keep in mind that we're being a little bit sneaky to even talk about multiplication like that. Thanks for the questions! -Ken "Dr." Math
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